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Finding the Fourth Proportional to 18,507.88, 27,735.90 and 9,729.64

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Solution

The fourth proportional to 18,507.88, 27,735.90 and 9,729.64 is: 14,580.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,507.88 : 27,735.90 = 9,729.64 : x
  2. Step 2: Convert to fraction form
    18,507.88/27,735.90 = 9,729.64/x
  3. Step 3: Cross multiply
    18,507.88x = 27,735.90 × 9,729.64
  4. Step 4: Simplify right side
    18,507.88x = 269,860,322.08
  5. Step 5: Solve for x
    x = 269,860,322.08/18,507.88
  6. Step 6: Final answer
    x = 14,580.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.